70+ Operations Engineer Interview Questions and Answers

The interview questions cover topics such as differential, favorite subject, connecting rod, and refrigeration.

• Differential is a mathematical concept that deals with the rate of change of a function.

• My favorite subject is mechanical engineering.

• Connecting rod is a component in an engine that connects the piston to the crankshaft.

• Refrigeration is a process of removing heat from a substance to lower its temperature.

• My hobby is reading books on history and philosophy.

Explanation of OSI model layers, HTTP status codes, encryption techniques, security assessment, networking protocols, common ports, and TCP/UDP use cases.

• OSI model layers: Physical, Data Link, Network, Transport, Session, Presentation, Application

• HTTP status codes: 200 OK, 404 Not Found, 500 Internal Server Error

• Encryption techniques: AES, RSA, DES

• Security assessment: Vulnerability scanning, Penetration testing, Security audits

• Networking protocols: TCP/IP, HTTP, FTP, SMTP

• Comm...read more

FIFO (First-In, First-Out) and LIFO (Last-In, First-Out) are inventory management methods.

• FIFO: Oldest items are sold first, used in industries like retail and food.

• LIFO: Newest items are sold first, used in industries like manufacturing and construction.

The height between Dearetor and BFP is important for boiler turbine efficiency, mill principle, and dosings in Dearetor and Boiler drum.

• The height ensures proper separation of steam and water in the deaerator.

• It allows for efficient operation of the boiler feed pump (BFP).

• The dosing of chemicals in the deaerator and boiler drum is optimized with the height difference.

• The mill principle is also affected by the height difference.

• Overall, the height between the deaerator and BFP...read more

I handle rejection and damaged materials by staying calm, assessing the situation, and taking appropriate action.

• Remain calm and composed when faced with rejection or damaged materials

• Assess the extent of the damage and determine the cause of rejection

• Take appropriate action to rectify the situation, such as repairing or replacing damaged materials

• Implement preventive measures to minimize future rejections or damages

• Maintain open communication with relevant stakeholders to ad...read more

To calculate optimum Reflux in a distillation column, one must consider the desired purity of the distillate and the efficiency of the column.

• Calculate the minimum reflux ratio required for the desired separation using the Fenske equation

• Consider the efficiency of the column and adjust the reflux ratio accordingly

• Perform iterative calculations to find the optimum reflux ratio that balances purity and energy consumption

5S is a methodology for workplace organization and standardization.

• Sort - eliminate unnecessary items

• Set in order - organize remaining items

• Shine - clean and inspect work area

• Standardize - establish procedures and schedules

• Sustain - maintain and improve

• Advantages include increased efficiency, safety, and quality

• Reduces waste and improves morale

• Example: A factory implements 5S to reduce clutter and improve workflow

Housekeeping person can help prevent major issues by regularly cleaning and maintaining equipment and systems.

• Train housekeeping staff on proper cleaning procedures for equipment and systems

• Schedule regular maintenance tasks for housekeeping staff to perform

• Encourage housekeeping staff to report any issues they notice during their cleaning duties

• Ensure housekeeping staff have access to necessary tools and supplies for maintenance tasks

• Provide ongoing training and support to h...read more

ABC analysis is a technique used to categorize items based on their importance or value.

• ABC analysis divides items into three categories: A, B, and C.

• Category A items are the most important and valuable, while category C items are the least important and valuable.

• ABC analysis is commonly used in inventory management to prioritize items for restocking or ordering.

• For example, a grocery store might use ABC analysis to prioritize restocking of high-value items like meat and dair...read more

I am proficient in measurements and mathematical calculations.

• I have a strong foundation in mathematics and can apply it to various measurements and calculations.

• I am comfortable using tools such as rulers, calipers, and micrometers to take accurate measurements.

• I have experience using software programs such as Excel and MATLAB to perform complex calculations.

• I am able to interpret and analyze data to draw meaningful conclusions.

• I am detail-oriented and take great care to ens...read more

BMS system is Building Management System, VFD controls motor speed, Star Delta Starter reduces motor starting current.

• BMS system is used to monitor and control various building systems such as HVAC, lighting, and security.

• VFD (Variable Frequency Drive) adjusts the speed of an AC motor by varying the frequency and voltage supplied to the motor.

• Star Delta Starter is used to reduce the starting current of a motor by initially connecting the motor in a star configuration and then...read more

Gravity is a force that pulls objects towards each other. It affects the weight of objects and determines how they move on Earth.

• Gravity is a fundamental force of nature that causes objects with mass to be attracted to each other.

• The strength of gravity depends on the mass of the objects and the distance between them.

• Gravity affects the weight of objects by pulling them towards the center of the Earth.

• Gravity also determines how objects move on Earth, such as falling to the g...read more

The Bernoulli equation relates the pressure, velocity, and elevation of a fluid flow.

• Describes the conservation of energy in a flowing fluid

• States that the sum of pressure energy, kinetic energy, and potential energy per unit volume remains constant along a streamline

• Used in fluid mechanics to analyze fluid flow in pipes, nozzles, and wings

GRN stands for Goods Receipt Note and e-way bill is an electronic document required for the movement of goods.

• GRN is a document used to record the receipt of goods from a supplier.

• It includes details such as the quantity, quality, and condition of the goods received.

• GRN helps in verifying the accuracy of the goods received and is used for inventory management.

• E-way bill is an electronic document required for the movement of goods worth more than a specified value.

• It is genera...read more

To minimize DC during system running period, ensure proper maintenance, regular inspections, and timely repairs.

• Regularly inspect and maintain equipment to prevent breakdowns

• Implement predictive maintenance techniques to identify potential issues before they occur

• Monitor system performance and address any abnormalities promptly

• Train staff on proper operation and maintenance procedures

• Utilize energy-efficient equipment to reduce DC consumption

Minimize DC during system running period by proper maintenance and monitoring.

• Regularly inspect and clean equipment to prevent dust buildup

• Monitor temperature and humidity levels to prevent overheating

• Implement proper grounding techniques to reduce electrical noise

• Use high-quality components to minimize risk of failure

• Implement redundancy in critical systems to prevent downtime

Various instruments and materials are used for stencils and textures.

• Stencils can be made using plastic, metal, or paper materials.

• Texture can be created using brushes, rollers, sponges, or spray guns.

• Stenciling tools include brushes, sponges, and airbrushes.

• Texture materials include joint compound, plaster, and spackle.

To troubleshoot network problems, the 'ping' command is commonly used.

• Use 'ping' command to check connectivity between devices

• Check for packet loss and latency with 'ping'

• Use 'traceroute' command to identify network hops and latency issues

Managing rake and daily basic involves planning, organizing, and prioritizing tasks efficiently.

• Create a daily schedule outlining tasks and priorities

• Delegate tasks to team members based on their strengths and workload

• Regularly communicate with team members to ensure tasks are being completed on time

• Adjust schedule as needed to accommodate unexpected issues or changes

• Use tools such as project management software to track progress and deadlines

The 8 pillars of TPM are foundational elements for implementing Total Productive Maintenance.

• Focused Improvement

• Autonomous Maintenance

• Planned Maintenance

• Quality Maintenance

• Training and Education

• Early Equipment Management

• Administrative and Office TPM

• Safety, Health, and Environment

Packet switching involves breaking data into packets for transmission, while store and forward switching involves receiving the entire message before forwarding.

• Packet switching breaks data into small packets for transmission, allowing for more efficient use of network resources.

• Store and forward switching receives the entire message before forwarding it to the next destination, which can lead to delays.

• Packet switching is commonly used in modern computer networks, such as th...read more

The drying time of painting products varies depending on the type of paint and environmental conditions.

• Oil-based paints take longer to dry than water-based paints.

• Humidity and temperature affect drying time.

• Some paints have specific drying times listed on the label.

• Thicker coats of paint take longer to dry than thin coats.

• Drying time can range from a few hours to several days.

Interior and exterior crack fillers are used to repair cracks in walls, ceilings, and floors.

• Interior crack fillers include spackling paste, joint compound, and caulk.

• Exterior crack fillers include concrete patching compound and elastomeric sealant.

• Fillers should be chosen based on the size and location of the crack.

• Proper preparation of the surface is important for effective crack repair.

• Follow manufacturer instructions for application and drying time.

The client clearance amount was $X.

• Check the client's account statement for the cleared amount

• Verify the transaction details in the system

• Confirm with the client directly if needed

Inventory is maintained through regular monitoring, accurate record-keeping, and efficient replenishment.

• Regularly monitor inventory levels to identify shortages or excesses

• Keep accurate records of all incoming and outgoing inventory

• Implement a system for efficient replenishment, such as using reorder points or automated ordering

• Conduct regular audits to ensure inventory accuracy

• Utilize inventory management software or tools to streamline the process

• Implement proper storage a...read more

A condensing turbine is a type of steam turbine that uses a condenser to increase efficiency.

• It operates by expanding steam through a series of blades to generate power.

• The steam is then condensed back into water, which is reused in the system.

• This type of turbine is commonly used in power plants and industrial settings.

• Examples include the Siemens SST-800 and GE's D11 steam turbine.

• Efficiency can be increased by using multiple stages of blades and optimizing the condenser de...read more

Potential difference in electrical refers to the voltage between two points in an electrical circuit.

• Potential difference is also known as voltage.

• It is measured in volts (V).

• It represents the work done per unit charge in moving a positive test charge between two points in a circuit.

• Potential difference is necessary for current to flow in a circuit.

• For example, a battery provides a potential difference to allow current to flow through a circuit.

TG rolling procedure and bed material specification are important for Operations Engineer.

• TG rolling procedure refers to the process of rolling the turbine generator to ensure smooth operation.

• Bed material specification refers to the type and quality of material used in the fluidized bed boiler.

• Both are crucial for efficient and safe operation of power plants.

• TG rolling procedure involves checking alignment, clearance, and bearing temperature.

• Bed material specification includ...read more

Forecasting is predicting future events based on past data. Operations involve managing resources to achieve business goals.

• Forecasting involves analyzing historical data to make predictions about future events

• Operations involve managing resources such as people, equipment, and materials to achieve business goals

• Forecasting can help operations teams plan for future demand and allocate resources accordingly

• Operations teams can use forecasting to optimize production schedules a...read more

To create an IPSec Tunnel with CSR, you need to configure the necessary settings on both devices.

• Configure the IPSec settings on the CSR device, including encryption algorithms, authentication methods, and pre-shared keys

• Ensure that the CSR device has a public IP address and is reachable from the remote device

• Configure the remote device with matching IPSec settings and establish the tunnel with the CSR device

PLC is a hardware device that controls processes, while SCADA is a software system that monitors and controls processes.

• PLC is a programmable logic controller used to control industrial processes.

• SCADA is a supervisory control and data acquisition system used to monitor and control processes.

• PLC is hardware-based, while SCADA is software-based.

• PLC is typically used for controlling specific tasks within a process, while SCADA is used for overall monitoring and control of the e...read more

HPP in SCR stands for High Pressure Pump.

• HPP is a crucial component in a Selective Catalytic Reduction (SCR) system.

• It is responsible for pumping the diesel exhaust fluid (DEF) into the exhaust stream to reduce harmful emissions.

• Examples of HPP brands include Bosch, Delphi, and Cummins.

PLC stands for Programmable Logic Controller and Scada stands for Supervisory Control and Data Acquisition.

• PLC is a hardware device used to control industrial processes.

• Scada is a software system used for monitoring and controlling processes in industries.

• PLC and Scada are often used together in industrial automation systems.

• Example: PLC can control the operation of a conveyor belt in a manufacturing plant, while Scada can monitor the temperature and speed of the belt.

• Example...read more

Bearing failure can be caused by factors such as improper lubrication, contamination, overloading, misalignment, and poor installation.

• Improper lubrication can lead to increased friction and wear on the bearing surfaces.

• Contamination from dirt, debris, or moisture can cause abrasion and corrosion, leading to premature failure.

• Overloading the bearing beyond its capacity can cause excessive stress and fatigue.

• Misalignment of shafts can result in uneven loading and increased wea...read more

Vivrofeeder is a device used in biotechnology for automated feeding of cell cultures in bioreactors.

• Vivrofeeder is designed to provide nutrients and maintain optimal conditions for cell growth in bioreactors.

• It helps in reducing manual labor and ensuring consistent feeding schedules.

• Vivrofeeder can be programmed to dispense specific amounts of nutrients at set intervals.

• Examples of nutrients dispensed by Vivrofeeder include glucose, amino acids, vitamins, and minerals.

RMHS stands for Remote Monitoring and Health System, while RLS stands for Remote Logging System.

• RMHS is used for monitoring and managing health-related data remotely.

• RLS is used for logging and storing data remotely.

• RMHS focuses on real-time health monitoring, while RLS focuses on data storage and retrieval.

• Examples: RMHS can be used to monitor vital signs of patients remotely, while RLS can be used to store sensor data from IoT devices.

I am an experienced operations engineer with expertise in Linux commands and a proven track record in my previous organization.

• Proficient in Linux commands and shell scripting

• Experience in managing and maintaining servers and applications

• Skilled in troubleshooting and problem-solving

• Collaborated with cross-functional teams to ensure smooth operations

• Implemented automation and monitoring tools to improve efficiency

• Managed and mentored junior team members

• Previous role: Operatio...read more

Spanning Tree Protocol is a network protocol that ensures a loop-free topology for Ethernet networks.

• Prevents loops in Ethernet networks by blocking redundant paths

• Designated switches are elected to forward traffic on each segment

• Uses Bridge Protocol Data Units (BPDUs) to communicate and determine the topology

• Common implementations include IEEE 802.1D (STP), 802.1w (RSTP), and 802.1s (MSTP)

The process of painting and waterproofing involves several steps to ensure a durable and long-lasting finish.

• Surface preparation is key to ensure proper adhesion of the paint or waterproofing material.

• Priming the surface helps to seal it and provide a good base for the topcoat.

• Applying the paint or waterproofing material should be done in thin, even coats to avoid drips and ensure proper coverage.

• Allowing sufficient drying time between coats is important to prevent cracking o...read more

Putty is a material used for filling gaps, cracks, and holes in surfaces. There are different types of putty for different applications.

• Acrylic putty is used for filling gaps in walls and ceilings

• Epoxy putty is used for repairing metal surfaces

• Glazing putty is used for sealing glass panes in windows

• Wood filler putty is used for repairing wooden surfaces

• Plumber's putty is used for sealing pipes and fixtures

• Silicone putty is used for sealing and bonding various surfaces

CRM stands for Customer Relationship Management. It is a strategy for managing interactions with customers and potential customers.

• CRM helps businesses to improve customer satisfaction and retention

• It involves collecting and analyzing customer data to better understand their needs and preferences

• CRM software can automate and streamline sales, marketing, and customer service processes

• Examples of CRM software include Salesforce, HubSpot, and Zoho CRM

There are approximately 4.3 billion IPv4 addresses and 340 undecillion IPv6 addresses.

• There are approximately 4.3 billion IPv4 addresses.

• IPv4 addresses are 32-bit numbers, allowing for a total of 2^32 addresses.

• There are 340 undecillion IPv6 addresses.

• IPv6 addresses are 128-bit numbers, allowing for a total of 2^128 addresses.

To troubleshoot a motor, start by checking for power supply issues, inspecting the motor for physical damage, testing the connections, and examining the motor's components.

• Check power supply to ensure it is connected and functioning properly

• Inspect the motor for any physical damage such as burnt wires or broken parts

• Test the connections to make sure they are secure and not loose

• Examine the motor's components like the capacitor, bearings, and brushes for any signs of wear or d...read more

Communication with clients involves clear and timely updates, active listening, understanding their needs, and providing solutions.

• Maintain regular communication through emails, calls, and meetings

• Listen actively to understand their requirements and concerns

• Provide updates on project progress and address any issues promptly

• Offer solutions that align with the client's goals and expectations

• Seek feedback to ensure client satisfaction

• Document all communication and agreements for...read more

Pascal's law states that a change in pressure applied to an enclosed fluid is transmitted undiminished to all portions of the fluid and to the walls of its container.

• Pressure applied to a confined fluid is transmitted equally in all directions

• The pressure at any point in a fluid at rest is the same in all directions

• Used in hydraulic systems to generate force or motion

• Example: Hydraulic car brakes work based on Pascal's law

5S is a methodology for workplace organization and efficiency.

• 5S stands for Sort, Set in Order, Shine, Standardize, and Sustain.

• Sort involves removing unnecessary items from the workplace.

• Set in Order involves organizing the remaining items in a logical and efficient manner.

• Shine involves cleaning and maintaining the workplace.

• Standardize involves creating and implementing standard procedures for maintaining the workplace.

• Sustain involves continuously maintaining the improvem...read more

Manpower is handled by proper planning, recruitment, training, and performance management.

• Plan manpower requirements based on workload and project needs

• Recruit skilled and qualified individuals through effective hiring processes

• Provide training and development opportunities to enhance skills and knowledge

• Implement performance management systems to monitor and evaluate employee performance

• Ensure proper workload distribution and effective communication within the team